FBI warns of Terror attack on a sports arena

The FBI has discovered a plot for three to five blonde or black american muslim suicide bombers....using handmade explosive belts hidden under their winter clothing. The plan states for one bomber to blow himself up in an arena, while the other bombers wait at the exits. When everyone is trying to leave the other bombers blow themselves up. It states they can kill more people in the panic when people are rushing to leave, then the initial blast. It is a very detailed plot that has been posted on muslim websites all over the world. They think it might be a basketball event with it being posted on the eve of March Madness.